Projector to computer?

Is there an Art Projector that can be hooked up to a computer?

• I would like to paint large scale murals on walls, ceilings, the sides of buildings (and also canvas) but I need help finding a projector that can be hooked up to a computer. I only need the projector to give me the outline? or the opaque version? or silhouette? of the image. The reason i would like the projector is to save me time in free hand drawing the correct proportions and perspective and scale and placement etc.... I want the projector to hook up to my computer because i create and adjust a lot of images using photoshop. However, i cannot find such projector unless it also plays movies and comes with audio and unnecessary added features. Does such a projector exist? Any other suggestions that might work instead?

• Answer:

  Even if there is such a projector, I imagine it would be hard to use it, because while you're up on a ladder drawing the image, the wind/ a squirrel /a robber could knock over your computer. Also the sunlight would make it hard to project images. So, I would suggest a grid. I imagine you could print out your computer image on paper, then enlarge onto your wall with a grid? I am a low tech person, so that's what I would do.